Re-infestation experiments with Ostertagia circumcincia in lambs.
D000818:Animals; D007411:Intestinal Diseases, Parasitic / Q000662:veterinary*; D012756:Sheep; D012757:Sheep Diseases / Q000276:immunology*; D014252:Trichostrongyloidiasis / Q000276:immunology / Q000662:veterinary*